First of all, the translation in the image is with letters (not words) in reverse order - הסתכלו לשמיים (it is directed to second-person masculine-plural; look below). The heavens can also mean שמים, like sky. For example, in Ecclesiastes 3:1 - לכל זמן ועת לכל חפץ תחת השמים - To everything there is a season and a time for every purpose under the heavens.

As you may know, while in English there is only one second-person pronoun (you), in French there are two (singular - tu and plural/formal - vous) and in Hebrew there are four (masculine-singular - אתה, feminine-singular - את, masculine-plural - אתם and feminine-plural - אתן), each has a different form of verb conjugation.